system

  1. newfutile

    Type of earthing system?

    What type of earthing system is this?
  2. F

    TT SYSTEM

    Took a swa cable to an outside metal shed, earthed at house end but insulated at shed end. Installed earth rods and got reading of 58ohm . all good. However glanded cable shed end for experiment and got 0.24ohms. Question what are the dangers and why cant you have both earthing systems in...
  3. Marvo

    Automobile Electrical & Electronic System 2004

    Marvo submitted a new resource: Automobile Electrical & Electronic System 2004 - Automobile Electrical & Electronic System 2004 Read more about this resource...
  4. S

    Generator powered offgrid system with batteries advice

    Hi all I hope everyone is doing well. I have a new rural small house coming up that I need to use generator power for. It's 105 sqm and the time and cost to get connected to the grid need to be pushed out for me. (1-2 years) Has anyone any experience with some type of battery connected to a...
    • speedystu
    • Thread
    • advice batteries custom generator generator set inverter new build off grid powered system
    • Replies: 11
    • Forum: UK Electrical Forum
  5. A

    AFCI breaker tripping ONLY WHEN grid tie solar system active

    I had solar installed professionally 3 years ago. The home is 10 years old and has 3 AFCI breakers for bedrooms. One AFCI circuit was hardly used. A new mini fridge was plugged into the rarely used circuit. The mini fridge (60 watt) now causes the AFCI breaker to intermittently trip. I moved...
  6. O

    UK Can someone tell me what this wiring system is called?

    Hey guys, I'm new here so please let me know if I'm breaking any rules. Can someone nudge me in the right direction for the attached? So I can do some research.
  7. G

    Split system wiring, with wild leg

    Hello, my name is Bruce. I'm a store owner trying to understand the wiring involved to install my split system. I have some electrical experience nothing professional. I observed and learned as much as possible when my building was built. Panel: 3 phase with wild leg Outdoor unit...
  8. B

    What specifications Solar Power System can be suggested to power a Medium Green House?

    Keeping a green house at a temperature sufficient to support sowing flower seeds in a green house from March even in the South of England must be expensive which is why I ask, "What specifications Solar Power System can be suggested to power a Medium Green House?"
  9. A

    can I plug in a Kohler standby 14kw to my 50amp receptacle

    can I plug in a Kohler standby 14kw to my 50amp receptacle which supplies both rails in a 200 amp box (already installed interlock system for my box) installation is more than the generator!
  10. J

    Can I install a BS-5839-1 fire alarm system or do I require specialist insurance cover outwith the norm

    THIS IS FOR ELECTRICAL NEWS ONLY
  11. J

    how to restore a pir zone on a system!

    Hello. I have an optima xm6 alarm. If i need to omit a pir zone the user guide is clear and it is easy. However, if i omit a pir zone and later wish to restore it on the system how is this done if it isn't a silly question? The user guide i have is not clear on this. Can this be done simply...
  12. S

    RcD x5 failure on TT system

    Hi Guys, recently installed a new radial socket circuit from CU. When ramp testing 30ma RCD at unit, without loads, everything was fine. When I energised the circuit and tested again, the furthest two sockets failed the x5 test giving a 40ms reading. Other sockets on the same circuit came in...
  13. S

    Fire panel & detectors system

    Hopefully someone who works with these regularly can hit me with some sort of tip here. Hotel owner I know decided to change all his detectors now it’s coming up general fault on the panel. I’m guessing he hasn’t noted in & out on cables before replacing but he’s sure he did. He also says it’s...
  14. Z

    Security system question

    I have a four camera wired system. I fancy adding a 5th camera. I have an idea that someone may have invented a splitter box that could rotate from one camera to another say every 30 seconds - so that you can cover 2 areas for the price of one channel on the recorder. any other ideas would be...
  15. M

    Fixed wiring testing required for an addressable fire alarm system?

    Hi, I would be grateful if anyone could confirm the certification required for the addition and extension of a fire alarm. Scenario is, I have installed the fixed wiring for the alteration to an addressable system as per their drawings, fire alarm contractor will commission. I assume I can...
    • Mike F
    • Thread
    • alarm fire fire alarm fixed required system testing wiring
    • Replies: 5
    • Forum: UK Electrical Forum
  16. S

    Selecting the proper solar panel/ battery system for 12v LED strip

    Hi all, Complete novice here, but I'm trying to learn. I am making a solar powered, back-lit estate/ driveway entrance sign, and am stuck regarding the correct wattage, amperage, etc for the panel and battery. I'm planning to use 5 meters of 12v 18w strip, but would like to be able to use...
    • Sign Guy
    • Thread
    • 12v battery led led strip panel proper solar solar panel strip system
    • Replies: 1
    • Forum: Lighting Forum
  17. C

    Disconnection Time for IT system

    What is the max disconnection time for an IT system? I think it would be shorter in that an MCB would only be triggered after a fault on two individual circuits hence double the loop impedance?
  18. cliffed

    Lighting system in open plan office

    Open plan office real dated lighting system...refitted led panel lights..each desk operates their lights over their desk, via a pull switch. Some have their lights on some off....is there any system that could work without using pull switches.
  19. S

    Advice on TT system

    When carrying out Ze with main earth disconnect I get a reading of 77.25 ohms. All good. When main earth is reconnected and all parallel paths in place reading comes down to 0.60 ohms. I have 3 lighting circuits not covered by an rcd all Zs readings are well in permitted Zs. Would any body apply...
  20. I

    TT system, earth to neutral not tripping RCD

    TT system, Zs on socket circuit is 77.2 down a good bit after I added a second earth rod. When I short neutral to earth RCD doesn't trip. Can anyone help me out and explain please.
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